Finding the Third Proportional to 2,144,640 and 4,465,680

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144,640 : 4,465,680 = 4,465,680 : x
2. Step 2: Convert to fraction form
   2,144,640/4,465,680 = 4,465,680/x
3. Step 3: Cross multiply
   2,144,640x = 4,465,680 × 4,465,680
4. Step 4: Simplify right side
   2,144,640x = 19,942,297,862,400
5. Step 5: Solve for x
   x = 19,942,297,862,400/2,144,640
6. Step 6: Final answer
   x = 9,298,669.18